Not bringing an offering which one might be obligated to bring, in case one is not obligated: Keritot 7b-8b
Bringing an offering which one might not be obligated to bring, because otherwise one would remain unable to consume sacred items: Rashi Keritot 8a "Ein hash'ar alav chovah"
Cases and Laws
Slaughtering an animal which is an offering, with an unsanctified fetus inside it: Temurah 11b-12a